Spindle-driving mechanism



`lume 19, 1923. ,458,930

J. F. FLAHERTY SPINDLE DRIVING MECHANISM Filed March '26, 1921 2 sheets-sheet 1 aac IF FLAHEHTY June 19,1923. 1,458,930

J. F. FLAHERTY SPINDLE DRIVING MECHANI SM Filed March 26,v 1921 2 Shee'tS-Sl'gee'h-B Frg Inn-Nros.

FLHHEKTK f7 tol-nef.

Patented June 19, 1923.

- UNITEDLSTATES JOHN F. FLAHERTY," or '.rOLnDo, Oia-1o, .AssIGNoR To 'rHfBOCk BEARING fgoMrnnY,

OF TOLEDO; OHIO,` A]oomfoml'rIon-Or OHIO@ 'Y A l srrnntnpnivme"MECHANISM Application ineaMargine,1921.."semiNaassaa To aZZIwwmi-t-m/ycoacrnf I 7Beit known that I, JOHN F.

is tol pro-i,

i vide al spindle drivingl mechanism adapted for `belt drivel andyet not possessingthe disadvantages; inherent; in lspindles that are directly driven byvmeans .of a belt. Other objects andthefeatures off-novelty will beapparentfrom the following descrip.-l tion taken in connection with the "accom` panying drawings, in which i H1, Figure 1 is a vertical section through a spindle drivingmechanism embodying the invention, the section being taken on the line 1 1 of Fig. 3;

Fig. 2 is a vertical section taken on the line 2 2 of Fig. 3;

,Fig 3 is a vertical section taken on the line 3-3 of Fig. 2;

Fig. 4 is a horizontal section on the line 4-4 of Fig., 2.

Fig. 5 is a longitudinal section through a double spindle driving mechanism embodying my invention.

This application is in part a division of my co-pending application No. 395,539, filed July 12, 1920 and the invention described ranged to receive the work-spindle 106. The

bearings 83a and 83b are spaced apart as shown in Fig. 1 and the spindle 106 carries, in the space between the bearings, a worm gear 130 by means of which the spindle 106 is rotated. The housing 83 is formed with a Fmir-rnmr, a citizen ofthe United States', and a resident 1 83g on the top and claimed herein has reference tothe and thev rotation,[supplies cantgto the bearings 83a and83b. The upperz part off the housing83fis provided'with.they l i bearings138 and.l 139 for Ia ,drivingishaft 137 which carries the. driving f pulley `140. Be"

tween thebearingsiss and lsejpheyshafe ,137't carries` a worm 1,36 whichv is keyedfor'. other-` thereby. y f

5A 'vertical shaft 13.3 iisalso arrangedl ,in thehousing83 and is mounted in thebear-y ings 83 .and 83?.y The shaft,133 carries at i wisesecuredfto thev shaft soastoberotated its lower endl a worm 134, lwhich meshes with'- the ygeary 130, andy carries at its yupper end,

a 'worm' gear 135 'which meshes withthe' worm136, andlthus :actsas an intermediate shaft fortr n'smit'ting the drive from ythe,

shaft 137v .touthef'sp'indle 106.

housing` 83 vcloselyl conforms toK the ylfv'ver part of thevgear and forms a chamber; f

ranged across the interior ofMthe'housin'g 83 to form a lubricant chamber for supplying the gears and 136 and a cover plate of the housing permits access to these gears.

In the operation of the mechanism the puly 5 ley will be driven by a belt in the usual manner and the power transmitted through the gearing and the intermediate shaft 133 to the work-spindle 106, the gearing absorbing the slight irregularities in the rotative speed of the shaft 137 due to vibration or lapping ofthe driving belt. Thistogether' with the meansl for lubricating the gears which have been provi'ded,results in unusual uniformlty in the rotative speed of the workspindle. f

In the mechanism illustrated in Figure two axially aligned spindles and .151

-which support the work 152 are driven by i, Vthe worm gears 153 `and 154, respectively.'`

The gear 153 is driven by a worm 155 on an'iOO I intermediate shaft 156 and thegear 154 `is'v y driven by a worm 157 on an intermediate shaft 158, these drives being similar to the arrangement shown in Figures 1 to 4. As in the construction illustrated in Figures lubricant chamber 130 around the gear 130 1. to 4, each ofthe shafts 156'and 158 has aV ,imil Y worm gear at its upper end, indicated respectively by the numerals 159 and 160. The worm 'gear 159 meshes with a worin 161 on shaft'162 which is parallel with the spindles 150 and 151 and the worm gear 160 meshes with a worm 163 which is splined on this same shaft and movable longitudi iially thereof. The shaft 162 is driven by a pulley 164. The housing 165 which carries the spindle 151 is adjustable axially of said spindle on the bed 166, relative to the housing 167, which carries the spindle 150, to vary the distance between thevcooperating ends of the spindles, the splined arrangement of the gear 163 on the shaft 162 perinitting this gear tov be adjusted with the housing 165 without affecting the drive.

Vith similar gear ratios for the drives for the spindles 150 and 151 it will be evident' the arrangement provides a smooth running drive for each spindle and also insures perfect synchronism. I have herein referred to the various gears as a worm oi' worm gear although such gears might alsobe designated by the more general term of spiral gear which I have employed in the claims. y y

While I am aware that spiral gears are l commonly used yet I believe that the use ot thesegears as shown in a mechanism for indirectly driving the work-spindle of a grinding machine, is new, and although I have shown a specific embodiment of my invention I desire to have it understood that I claim such modifications as lcome within the spirit of the invention as defined in the appended claims.

Having thus described my invention, what I claim is 1. In a grinding machine, the combination of a housing, a work-spindle mounted in spaced bearings in said housing, a driven gear on said spindle between said bearings, said housing being formed with a lubricant chamber around said driven gear from which said gear and said bearings are supplied with lubricant, a drive shaft arranged in a plane parallel with the plane of said spindle and mounted in spaced bearings in said housing, a spiral gear on said shaft bei tween the last-mentioned bearings, an intermediate shaft, gears on said intermediate shaft meshing respectively with said spiral gears, and said housing having a partition therein forming a lubricant chamber from which the second-mentioned spiral gear and the gear meshing therewith are lubricated.

2..In a grinding machine, the combination of two axially aligned cooperating work spindles. a separate intermediate drive shaft for each spindle arranged at right angles thereto. spiral gearing between each of said shafts and its spindle, a drive shaft arranged parallel with said spindles, av pair 'i of spiral gears between said drive shaft and each of said intermediate shafts, one of which has a splined connection with said drive shaft, and relatively adjustable housings ior each oic said work spindles and the gearing whereby shaft.

In testimony whereof I affix my signature.

JOHN F. FLAHERTY.

it is driven from said drive 

